鄂尔多斯盆地合水地区长6油层组沉积特征研究

发布时间：2018-04-21 13:44

本文选题：合水地区 + 长6油层组　；参考：《东北石油大学》2017年硕士论文

【摘要】：合水地区位于鄂尔多斯盆地内的西南部,长6油层组为研究区的主力层之一。已有的钻井资料显示,本地区的油水关系复杂,需要对长6油层组的沉积体系类型、沉积微相特征及其演化规律进行精细研究。本文得出结果如下:1.应用沉积学、地层学等前沿方法,选取大量的岩心资料、测井曲线资料以及录井资料,进行地层划分与对比,将合水地区长6油层组划分为3个油层,分别为长61油层、长62油层、长63油层。2.通过分析岩石学特征、地层厚度、测井相、单井相、联井剖面相以及砂体厚度,并结合前人先进研究成果,研究了合水地区长6油层组沉积体系类型、沉积微相特征。合水地区长6油层组沉积时期研究区物源方向多样,主要物源方向为东南-西北向和西南-东北向;长6油层组发育有6种沉积亚相,分别为辫状河三角洲前缘、滨浅湖、半深湖-深湖、湖底扇内扇、中扇和外扇。辫状河三角洲前缘又进一步分为水下分流河道、水下分流间湾、河口坝微相,湖底扇内扇进一步分为主沟道、主沟道外微相,湖底扇中扇进一步分为辫状沟道、辫状沟道间微相。3.综合以上成果可知,从下至上长6油层组显示了进积的沉积序列,揭示了合水地区长6油层组沉积相的展布特征及其演化规律。分析得出构造、古地貌、古气候和沉积物供给四种因素综合控制长6油层组的沉积。
[Abstract]:The Heshui area is located in the southwest of the Ordos Basin. Chang 6 oil formation is one of the main layers in the study area. The existing drilling data show that the oil-water relationship in this area is complex and it is necessary to study the types of sedimentary system sedimentary microfacies and their evolution rules of Chang 6 reservoir formation. The result of this paper is as follows: 1. In this paper, a lot of core data, logging curve data and logging data are selected to carry out stratigraphic division and correlation by using the methods of sedimentology, stratigraphy and so on. The Chang 6 reservoir formation in Heshui area is divided into 3 reservoirs, each of which is Chang61 reservoir. Chang62 reservoir, Chang63 reservoir. 2. Based on the analysis of petrological characteristics, formation thickness, logging facies, single well facies, combined well profile facies and sand body thickness, and combined with previous advanced research results, the sedimentary system types and sedimentary microfacies characteristics of Chang 6 reservoir formation in Heshui area are studied. In the study area of Chang 6 oil formation in Heshui area, the direction of provenance is various, the main source direction is southeast northwest and southwest northeast, and there are six sedimentary subfacies in Chang6 oil formation, which are braided river delta front and shallow lake, respectively, and the main source direction is southeast to northwest and southwest to northeast, and there are six kinds of sedimentary subfacies in Chang 6 reservoir formation. Half deep lake-deep lake, sublake fan inner fan, middle fan and outer fan. The front edge of braided river delta is further divided into subaqueous distributary channel, underwater distributary bay, estuarine dam microfacies, sublacustrine fan inner fan is further divided into main channel, main channel outside microfacies, and sublacustrine fan is further divided into braided channel, Braided channel microfacies. Combined with the above results, the sedimentary sequence of the lower uppermost Chang 6 reservoir is shown, and the distribution characteristics and evolution law of the sedimentary facies of the Chang 6 oil formation in Heshui area are revealed. Four factors, structure, paleogeomorphology, paleoclimate and sediment supply, control the deposition of Chang 6 oil formation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13

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